4 Bible Verses about Justification Excluding Boasting

Where is boasting then? It is excluded. By what law? of works? Nay: but by the law of faith. Therefore we conclude that a man is justified by faith without the deeds of the law.

For if Abraham were justified by works, he hath whereof to glory; but not before God.

And base things of the world, and things which are despised, hath God chosen, yea, and things which are not, to bring to nought things that are:

For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: